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The authors aim to establish a technology for real-time measurement and correction of minute displacement of large optical structures in orbit. A test bed simulating a satellite-mounted telescope will be fabricated using a 70 cm ceramic mirror, and a demonstration test will be conducted applying the displacement compensation strut. First, as a preliminary verification of the demonstration test, an elemental test was conducted using a displacement compensation strut of the same size as the test bed. As a result, we confirmed that a control accuracy of ±10 nm could be achieved for a control range of 10 to 90 μm.
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R. Tagai, K. Kitamoto, H. Hamori, T. Mizutani, T. Kawashima, A. Iwasaki, "High-precision real-time displacement control for large optical system structure," Proc. SPIE 12486, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023, 124860E (18 April 2023); https://doi.org/10.1117/12.2652282